| Reiko vs Lili | 6–7 | 46.15% |
| Reiko vs Eddy | 2–10 | 16.67% |
| Reiko vs Azucena | 1–10 | 9.09% |
| Reiko vs King | 1–9 | 10.00% |
| Reiko vs Steve | 2–7 | 22.22% |
| Reiko vs Law | 1–7 | 12.50% |
| Reiko vs Hwoarang | 1–7 | 12.50% |
| Reiko vs Dragunov | 1–7 | 12.50% |
| Reiko vs Clive | 2–6 | 25.00% |
| Reiko vs Leroy | 1–5 | 16.67% |
| Reiko vs Jun | 3–3 | 50.00% |
| Reiko vs Kuma | 2–3 | 40.00% |
| Reiko vs Feng | 2–2 | 50.00% |
| Reiko vs Reina | 1–3 | 25.00% |
| Reiko vs Lidia | 1–3 | 25.00% |
| Reiko vs Jin | 2–1 | 66.67% |
| Reiko vs Yoshimitsu | 2–0 | 100.00% |
| Reiko vs Kazuya | 0–2 | 0.00% |
| Reiko vs Jack-8 | 0–2 | 0.00% |
| Reiko vs Leo | 0–2 | 0.00% |
| Reiko vs Alisa | 0–2 | 0.00% |
| Reiko vs Claudio | 0–2 | 0.00% |
| Reiko vs Shaheen | 0–2 | 0.00% |
| Reiko vs Lee | 1–1 | 50.00% |
| Reiko vs Miary Zo | 0–2 | 0.00% |
| Reiko vs Bryan | 0–1 | 0.00% |
| Reiko vs Lars | 1–0 | 100.00% |
| Reiko vs Nina | 1–0 | 100.00% |
| Reiko vs Zafina | 1–0 | 100.00% |
| Reiko vs Armor King | 1–0 | 100.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.